The sobering fact is heart disease accounts for the majority of deaths among older Boston terriers. This is commonly due to a genetic predisposition toward valve deterioration and can be often be heard as a heart murmur during your dog's annual exam.
Diarrhea usually is a sign that something is bothering the dogâs gastrointestinal tract. Some cases of diarrhea are caused by minor digestive distractions, such as when dogs eat people food or get into the garbage. Diarrhea can also be caused by more serious problems, like poisoning or systemic disease. Diarrhea can come on quickly, be severe and then go away. It also can happen gradually and last for a long time. Affected dogs often are nauseous and have intestinal cramping and pain.
Virus. Norovirus is a major cause for diarrhea-induced gastroenteritis. The virus is mainly found in dog feces but can also inhabit food, water, surface areas, vomit and saliva. Dogs are most likely to catch this virus from young children.ick dogs can give some illnesses to humans. Thinkstock/Comstock/Getty Images. If your dog is experiencing diarrhea or vomiting, it's best to take precautions such as washing your hands frequently. Some viruses and bacteria can transmit from dog feces to humans, causing a stomach bug.